Discovered husband cheated in my first tri

Came across pictures my husband took with a beautiful Thai girl (for keepsake!!??!) and was devastated when I found out she was engaged through a local escort agency offering massages and special services. He finally admitted he did that foolish act during my first trimester and said he had his needs, didn't know what went through his mind when it happened.

He says it was that just ONE time, he is guilty and remorseful but I just think this is plain rubbish because he had clearly not shown that throughout my pregnancy. If he was indeed feeling guilty, he sure was hiding it very well! I now blame myself for not giving in to his needs in my first trimester or thereafter.

Since the birth of my beautiful daughter, he has been a hands on father, but the image kept replaying in my mind and I feel extremely disgusted when he comes near. He has breached my trust and I am finding it very hard to deal with this pain I'm facing. At this point, if I was single without a newborn I would have left him simply because I feel that once your trust has been breached, it's almost impossible to maintain the relationship you once enjoyed. I am able to forgive but I know deep down it'll be hard for me to forget being cheated upon so early in my pregnancy.

But with my little girl and he's such a doting father, I feel the resentment having to work really hard to keep this relationship when (a) he was the one who caused this mess and (b) he thinks men are built different from women, in his own words, "we do it without the emotional attachment."

So am I to accept his behaviour now and risk him doing it again but gets better at hiding his infidelity? Please help, I need some sound advice.